Hello, Following the "release early, release often" motto, I am happy to announce version 0.1.0 of HSH, the Haskell shell. You may obtain it with: darcs get --tag 0.1.0 http://darcs.complete.org/hsh Things are still very rough in many ways, but this version already lets you: * Run commands * Pipe things between commands * Pipe command input/output into and out of pure Haskell functions * Pure Haskell functions are as much a first-class citizen as is grep or cat Here is an example session: $ ghci -fglasgow-exts HSH *HSH> run $ ("ls", ["."]) COPYING HSH HSH.hs TODO announcements testsrc COPYRIGHT HSH.cabal Makefile _darcs test.hs *HSH> run $ ("ls", ["-l"]) -|- ("wc", ["-l"]) 12 *HSH> :m +Text.Printf *HSH Text.Printf> let countLines = (zipWith (\i line -> printf "%-5d %s" i line) [(1::Int)..])::([String] -> [String]) *HSH Text.Printf> run $ ("ls", ["-l"]) -|- countLines -|- ("grep", ["hs$"]) 6 -rw-r--r-- 1 jgoerzen jgoerzen 1285 Jun 6 09:43 HSH.hs 11 -rw-r--r-- 1 jgoerzen jgoerzen 565 Jun 6 09:43 test.hs *HSH Text.Printf> :m +Data.List *HSH Text.Printf Data.List> run $ ("ls", ["-l"]) -|- countLines -|- filter (isSuffixOf "hs") 6 -rw-r--r-- 1 jgoerzen jgoerzen 1285 Jun 6 09:43 HSH.hs 11 -rw-r--r-- 1 jgoerzen jgoerzen 565 Jun 6 09:43 test.hs *HSH Text.Printf Data.List> run $ ("ls", ["-l"]) -|- countLines -|- filter (isSuffixOf "hs") -|- ("tr", ["a-z", "A-Z"]) 6 -RW-R--R-- 1 JGOERZEN JGOERZEN 1285 JUN 6 09:43 HSH.HS 11 -RW-R--R-- 1 JGOERZEN JGOERZEN 565 JUN 6 09:43 TEST.HS *HSH Text.Printf Data.List> let generator = \(_::String) -> unlines . map show $ [1..20] *HSH Text.Printf Data.List> generator "" "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20\n" *HSH Text.Printf Data.List> run $ generator -|- ("grep", ["1"]) 1 10 11 12 13 14 15 16 17 18 19 Future versions will likely simplify syntax to make it easier to write scripts and introduce a sh to hsh converter. I also plan to add pure Haskell tools for some common shell-ish things that one could do in Haskell. -- John